My twitter timeline widget is not updating often. My last tweet in the widget was 6 hrs ago; however, I tweeted in via twitter several tweets in the last 4 hours. Is the timeline widget broken? Is there a way to set the update interval for more frequent updates?

The Twitter timeline widget doesn't use the Twitter API; it is embedded into your site via an iFrame, and hosted on Twitter.com. I'm afraid you won't be able to control how often the timeline is updated, as Twitter doesn't offer such option.